What was found
FLIGHT 1130 PBG-BUF - WHILE ON APPROACH THE PILOT REDUCED POWER AND THE LT ENGINE DID NOT RESPOND. THE PILOT RECEIVED VECTORS OFF THE APPROACH AND DISCOVERED THE ENGINE COULD INCREASE POWER BUT COULD NOT REDUCE POWER. THE PILOT ELECTED TO SHUTDOWN THE LT ENGINE AND DECLARED AN EMERGENCY. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE EVALUATED THE AIRCRAFT AND SUSPECTED A FAULTY FUEL CONTROL UNIT. THE FCU WAS REPLACED WITH A SERVICEABLE UNIT, RIGGED AND RUN WITH NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.